Car roof



Patented Nov. 25,` 1947 UNITED STATES PATENT OFFICE GAR. ROOF" Douglas J. .Baillie,. Montreal, .Quebec,. Ganada Application February 26, 1944, Serial No. 523,989

6 Claims.

Iihefinvention` relates. to'metal car roofs of the type wherein self-supportingv roof' sheets extend:

from side to side of the car andI are` rigidly secured along' their adjacent marginsby'upstandiing' flanges that function. as carlines andY have' members depending therefrom for supporting an underlying'insulating'lining The principal object of the invention is to pro'- vide a roof structure having` great strength throughout the carline portionsthere'of andnovel means for strengthening the eaves portions of' the roof sheets.

Another object is to provide anY improved roof' structure having great strength and comprising a minimum number of component parts; these partsbeing substantially the roof sheets and seam covers.

A further object is to' provide animproved roof structure wherein the carline portions do not require separate rigidifying strips intermediate the adjacent upstanding flanges of adjoiningY roof sheets.

A further object is to provide a-roofL structure' not requiring separate mounting or connecting' members-LtosupportV the insulating lining'and' lining supporting purlines.

Another1 object is to provide an improved-roof" Structure wherein the eaves portions of'L the roof sheets do notrequireiseparate supporting mem bers-aiiixedto'the side plates ofthe car.

A further important. object: of theinventionl isv` to. p rovideV an improved', roofv structure .having a` minimum number of. componenti parts, resulting;

in economy of'manufactureof.' the roof andeconomy of.- application of the roofto the car;-

Still another object isy to provide a. roofstruciture wherein thereof sheets andseam covers mayv be made of the same gauge of metal, eliminating the necessity for using a heavier metal sheetfor' the seamcover than-used in the roof sheets.

Other objects, advantages and capabilities' of.

the inventionwillappear from the following description of the preferred embodiment thereof, takenA in conjunction with the accompanying drawings, in which:

Figure l is a fragmentary plan-view'of'the car4 roof structure.

Fig. 2 is a fragmentary transverse sectional View of. substantially one half of the structure shownin Fig. 1, taken along line 2---2A of Fig. 1.

Fig. 3 is an enlarged fragmentary sectional viewv taken-along line 3-3 of Fig. 2.

Fig. 4 is an enlarged fragmentary plan view of the eaves portions of adjoiningroof sheets, with the seamv cover. removed in. order to show the method offorming the marginal reinforcements ofthe roof sheets;

Fig; 54 is' an enlarged fragmentary plan'viewY of'l the roof structure adjacent the seam cover, adapted to showthe'method of'r mounting the insulating liningv upon the roof.

Fig; 6 illustrates an alternate'method of forming thelongitudinal margin of the roof sheet.

Referring to the drawings, the roof sheets are' indicated as A, the side plates as B, the seam` covers as C,r the purlines as`Dand the insulating.

wardly bent portion I4 having a re-bend at its.

upper extremity, an integral downwardly extend#- ing portion I6 in parallel abutting engagement with the portion I4 and a lateral flange portion I8` in parallel underlying abutting engagement" with yt-he'a'dja'cent4 plane portion of the sheet A. 'It will be seen that the flange I!! comprisesv a;

30 double thickness as compared with the conventional single thickness, thereby adding strength to the flange I0. The depending flange I 2 maybe provided adjacent its lower extremity with a rebend and an upwardly extending wall 20 in abutting engagement with the flange I2 adapted to provide eavesfianges on the sheet A having dou-v ble thickness. The lower marginal portion of the' flange I2 may be vertically disposed and may be connected With the major plane portion of sheet A by an arcuate portion extending laterally of' the sheet, this arcuate portion being preferably formed on a large radius and both the flange I2 and the wall 20 being in abutting relationship throughout the arcuate portion.

The free edge 0f the flange portion I8 and the free edge of the wall 20 may be slightly curled inl a direction away from the adjacent plane ponV tion of the sheet A, in order to prevent chafing therebetween.. The flange I8 may` be provided along its length with spaced apart downwardly depressed portions 22, each having a shelf portion 24 in underlying spaced relation withthe adjacentplane portion of the sheet A. The por'- tion 24 may be connected with the flange I 8byf.

means.of'.a.wall.26.and walls 23 integral Withthe The flange IIl" flange I8. The portion 24 may have an aperture 29 of key-hole conguration with a circular portion 30 and an opposed portion 32 of reduced size rectangular in shape.

The seam cover C may comprise a sheet metal member of inverted U-shaped conguration including parallel spaced apart vertical walls 34-34 integrally joined at their upper extremities and having opposed lateral fianges 36 adjacent their lower extremities. The seam cover C is adapted to embrace the adjacent anges IIl-I of adjoining sheets and may be afxed thereto by rivets 38. The depressed portions 22 may be located coincident with the location of the purlines D and purlines D may be secured in underlying engagement with the portions 24 by means of vertically disposed carriage bolts di) and fastening nuts. The head of the bolt 4i) may be upwardly inserted through the circular portion 30 of the aperture 29, after which the bolt may be bodily moved in a lateral direction until the square shouldered portion of the carriage bolt registers with and will be held against axial movement by the portion 32 of the aperture 23 while the fastening nut is being tightened on the bolt.

The eaves anges I2 of the sheet A may be riveted to the upstanding flange of the adjacent side plates B-B by means of the usual rivets d2. The corner portions of the sheet A may be suitably coped out before forming the sheet whereby the ends of the ianges I8 may terminate adjacent the walls ZIJ-2U, as best shown in Fig. 4. While I have shown spacing between the end of the ange I8 and the adjacent free edge of the wall 2Q I contemplate having the end of the flange I3 butt the edge of the adjacent free edge of the wall 20 and connecting them as by welding, if

this additional strength is desired. While the end of the seam cover C may be of conventional tapered design I prefer to maintain a constant depth throughout the length of the seam cover in order to use fastening rivets throughout the arcuate end portions of the seam covers, in the interest of adding strength to the seam structure adjacent the eaves.

As best shown in Fig. 6, I contemplate an alternate method of forming the opposed longitudinal edges of the sheet A, comprising an upstanding wall portion 'lfl, a re-bend at the upper extremity of wall portion d4, a downwardly extending wall portion i5 in parallel abutting engagement with and extending a substantially uniform depth below said wall portion 4S. The lower marginal portion of the wall portion 46 may be provided with a lateraliy extending ange t8 in substantially uniformly spaced relation with the adjacent plane portion of the sheet A. This alternate method will eliminate the necessity for forming the spaced apart depressed portions 22 and will increase the supporting strength of the longitudinal margin of the sheet A by increasing the amount of metal in vertical disposition. I further contemplate the structure shown in Fig. 6, without the laterally extending ange d8, for cars not requiring the insulating lining E', in which case the wall portion #l may be of optional depth throughout the width of the car according to predetermined load supporting strength desired. Where the wall portion il@ isV used without the lower fiange 38, the adjacent abutting wall portions IIS-46 of adjoining sheets may be secured below the roof line by horizontally disposed rivets extending through said abutting wall portions.

The carline portions referred to herein is intended to mean that portion of the roof coincident with the location of the seam covers C.

It will be understood that the double-walled flange of the longitudinal margin of the roof sheet need not be on both longitudinal margins of the sheet, as one margin may comprise the singlethickness upwardly turned flange of the prior art and the opposed ange may be of the doublethickness structure as shown in the drawings, without departing from the scope of my invention. It will further be evident that that portion of the flange I which provides the double-thickness may be disposed substantially on the upper surface of the roof sheet instead of the reverse, as shown in the drawings.

I claim:

1. A car roof including a plurality of adjacent laterally disposed roof sheets provided with opposed longitudinal upstanding marginal ilanges and a seam cover adapted to secure the said flanges of adjacent roof sheets in aixed relationship; one of said anges being re-bent to form a downwardly extending wall in adjacent parallel relation therewith adapted to provide a doublethickness flange, said wall being disposed in a vertical plane and being vertically coextensive with the flanges to add load supporting value to the iianges.

2. A car roof including a plurality of adjacent laterally disposed roof sheets provided with opposed longitudinal upstanding marginal flanges and a seam cover adapted to secure the flanges of adjacent roof sheets in parallel adjacent xed relationship; one of said flanges being re-bent to form a downwardly extending wall in adjacent parallel relation therewith, said wall being disposed in a substantially vertical plane and ,extending below the major portion of the roof sheets, adapted to function as a tension member to add load supporting value to said one of said flanges.

3. A car roof including a plurality of adjoining roof sheets disposed laterally of the car provided with opposed longitudinal marginal upstanding flanges anda seam cover adapted to secure the flanges of adjacent roof sheets in fixed relationship; one flange being re-bent to form a downwardly extending wall provided with a lateral ange adjacent its lower margin, said wall and said lateral iiange being integrally formed with said one ange and being in adjacent parallel relation with said one flange and the adjacent portion of the roof sheet, respectively.

4. A car roof including a plurality of adjacent roof sheets extending laterally of the car and provided with opposed longitudinal marginal upstanding anges and a seam cover adapted to embrace and rigidly secure the upstanding flanges of adjacent roof sheets in parallel adjacent relationship; one of said flanges being re-bent to form an outwardly disposed and downwardly extending wall terminating in a laterally disposed edge portion, said wall and said edge portion being in adjacent parallel relation with said one of said anges and the under side of the adjacent portion of the roof sheet, respectively.

5. A car roof structure including a plurality of of adjacent metal roof sheets disposed laterally of the car, a beam extending longitudinally of the car in underlying supported relation with said sheets, an insulating lining in underlying relation with said sheets and supported by said beam, said sheets having opposed longitudinal marginal upstanding anges, and a. seam cover adapted to embrace and secure the upstanding flanges of under surface of said depressed portion whereby said beam will be in underlying spaced relation with said roof sheet.

6. A car roof structure including a plurality of adjoining metal roof sheets disposed laterally of the car, a plurality of spaced apart purlines extending longitudinally of the car in underlying spaced relation with said roof sheets, an insulating lining in underlying spaced relation with said roof sheets supported by said purlines, said sheets 20 having opposed longitudinal marginal upstanding anges, and a seam cover adapted to secure the upstanding anges of adjacent sheets in adjacent affixed relationship; one of said anges being rebent adjacent its upper extremity to form an integral depending wall terminating in a lateral ange, said wall extending below the plane of said roof sheets and said lateral ange being spaced downwardly from the roof sheets, and means for detachably securing said purlines in supported relation with said lateral flange.

DOUGLAS J BAILLIE.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date Re. 17,442 Hayman Sept, 24, 1929 453,470 Geiger June 2, 1891 2,112,810 Hawkesworth Mar. 29, 1938 915,352 Hoiman Mar. 16, 1909 

